package org.smart4j.chapter2.util;

/**
 * 转型工具类
 */
public class CastUtil {
    /**
     * 转为String 型
     */
    public static String castString(Object obj){
        return castString(obj,"");
    }

    /**
     * 转为String型(提供默认参数)
     */
    public static String castString(Object obj,String defaultValue){
        return obj != null ? String.valueOf(obj) : defaultValue;
    }

    /**
     * 转型为Double型
     */
    public static Double castDouble(Object obj){
        return castDouble(obj ,0);
    }

    /**
     * 转型为Double型(默认参数为0)
     */
    public static Double castDouble(Object obj,double defaultValue){
        double doubleValue = defaultValue;
        if(obj != null){
            String strValue = castString(obj);
            if(StringUtil.isNotEmpty(strValue)){
                try{
                    doubleValue=Double.parseDouble(strValue);
                }catch (NumberFormatException e){
                    doubleValue=defaultValue;
                }
            }
        }
        return doubleValue;
    }

    /**
     * 转为Long型
     */
    public static long castLong(Object obj){
        return CastUtil.castLong(obj,0);
    }

    /**
     * 转为long型
     */
    public static long castLong(Object obj,long defaultValue){
        long longValue= defaultValue;
        if (obj != null){
            String strValue = castString(obj);
            if (StringUtil.isNotEmpty(strValue)){
                try{
                    longValue= Long.parseLong(strValue);
                }catch(NumberFormatException e){
                    longValue = defaultValue;
                }
            }
        }
        return longValue;
    }

    /**
     * 转为int型
     */
    public static int castInt(Object obj){
        return CastUtil.castInt(obj,0);
    }

    /**
     * 转型为int(默认值为0)
     */
    public static int castInt(Object obj,int defaultValue){
        int intValue = defaultValue;
        if(obj != null){
            String strValue = castString(obj);
            if(StringUtil.isNotEmpty(strValue)){
                try {
                    intValue = Integer.parseInt(strValue);
                }catch (NumberFormatException e){
                    intValue=defaultValue;
                }
            }
        }
        return intValue;
    }

    /**
     * 转为boolean型
     */
    public static boolean castBoolean(Object obj){
        return CastUtil.castBoolean(obj, false);
    }

    /**
     * 转型为boolean型(默认值false)
     */
    public static boolean castBoolean(Object obj,boolean defaultValue){
        boolean booleanValue = defaultValue;
        if(obj != null){
            booleanValue = Boolean.parseBoolean(castString(obj));
        }
        return booleanValue;
    }






}
